Hnub Tim: 30, Sep, 2024
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(5) Lub zog thaum ntxov tus neeg sawv cev thiab lub zog ua kom muaj zog dej
Ib txhia tau ntxiv ncaj qha rau cov hmoov qhuav, thaum lwm tus yuav tsum tau sib xyaw ua cov kev daws teeb meem thiab siv raws li cov lus qhia rau kev siv. Yog tias nws tau sib xyaw ua cov hmoov nplej qhuav, nws yuav tsum qhuav-ua ntej thiab kev sib xyaw ua ntej, tom qab ntawd ntxiv lub sijhawm yuav tsum tsis pub tsawg tshaj 3 feeb. Yog tias siv los ua kev daws teeb meem, dej kub ntawm 40-70 ° C tuaj yeem siv los ua kom nrawm muaj kev sib cais. Tom qab pouring, nws yuav tsum tau npog nrog zaj duab xis yas rau kev kho. Hauv cov chaw tsawg-qhov kub, nws yuav tsum tau them nrog cov khoom siv rwb thaiv tsev. Tom qab kev teeb tsa zaum kawg, nws yuav tsum tau watered thiab moisturized tam sim ntawd rau kev kho. Thaum chav kho hluav taws xob yog siv rau cov pob zeb sib xyaw nrog lub zog thaum ntxov tus neeg sawv cev, lub chav kho lub cev yuav tsum txiav txim siab los ntawm kev sim.
(6) cov tshuaj pleev
Cov tshuaj tiv thaiv tau qhia txog qhov kub ntawm -5 ° C, -10 ° C, -15 ° C thiab lwm hom. Thaum siv nws, nws yuav tsum tau xaiv raws li qhov ntsuas kub qis txhua hnub. Pob zeb ua ke nrog cov tshuaj tua kab mob yuav tsum siv Portland cement lossis Portland cement nrog tsis tsawg tshaj 42.5MPA. Kev siv cov alumina siab loj yog nruj me ntsis txwv. Chloride, Nitrite thiab nitrate cov tshuaj antifrreezes yog nruj me ntsis txwv tsis pub siv hauv cov phiaj xwm prestineeded. Cov ntaub ntawv raw yuav tsum tau rhuab thiab siv, thiab tov tawm qhov hluav taws xob kub yuav tsum tsis qis dua 10 ° C; Tus nqi ntawm cov tshuaj tiv thaiv thiab cov kev sib piv dej-xis mas yuav tsum raug tswj hwm nruj; Lub sijhawm sib xyaw yuav tsum yog 50% kav ntev dua li qhov kub thiab txias. Tom qab pouring, nws yuav tsum tau them nrog zaj duab xis yas thiab rwb thaiv tsev rwb thaiv tsev, thiab tsis pub dej hauv lub sijhawm thaum lub sijhawm tsis zoo.
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(7) nthuav dav tus neeg sawv cev
Ua ntej kev tsim kho, kev sib tov sib xyaw yuav tsum tau nqa tawm los txiav txim siab ntau npaum li cas thiab xyuas kom meej tus nqi nthuav dav. Cov tshuab sib xyaw yuav tsum siv, lub sijhawm sib xyaw yuav tsum tsis pub tsawg tshaj 3 feeb, thiab lub sijhawm sib xyaw yuav tsum yog 30 feeb ntev dua li ntawm cov pob zeb tsis muaj admixtures yam tsis muaj kev yoog. Shrinkage-them pob zeb ua yuav tsum tau mechically vibrated los xyuas kom meej convactness; Neeg kho tshuab kev co yuav tsum tsis txhob siv rau kev sau ua vaj tse nrog cov slump saum 150 hli. Cov pob zeb nthuav dav yuav tsum tau kho nyob rau hauv cov xeev noo rau ntau dua 14 hnub, thiab tom kawg yuav tsum tau kho los ntawm kev txau tus neeg kho mob.
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(8) Tus neeg sawv cev teeb tsa
Thaum siv cov neeg sawv cev nrawm nrawm, muaj kev saib xyuas kom tau them rau qhov yoog raws li cov cement, thiab cov nqi thiab siv tau kom raug. Yog tias cov ntsiab lus ntawm C3A thiab C3S hauv Caas yog qhov siab, cov qhob sib xyaw ntawm cov tsuj hlau yuav tsum tau nchuav lossis txau hauv 20 feeb. Tom qab cov pob zeb ua yog tsim, nws yuav tsum yog moisturized thiab tswj kom tiv thaiv kom qhuav thiab tawg.
Lub Sijhawm Post: Kaum-09-2024